Watch-regulator.



N0.a61,s84. MTENTEDJULYSO, 1907.

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WATCH REGULATOR.

Arrmoulol FILED JULY 24. 1905.

2 SHEETS-SHEET 1.

y y a] ff-z l Z Y M( No. 861,884. PATENTED JULY 30, 190'7. 0 OHLSONWATCH REGULATOR.

APPLIOATION FILED JULY24.1905.

2 SHEETS-SHEET 2.-

OLOF OHLSON, OF NEWTON,

MASSACHUSETTS, ASSIGNOR, BY MESNE ASSIGNMENTS, TO

WALTHAM WATCH COMPANY, A CORPORATION OF MASSACHUSETTS.

WATCH-RE GULATOR.

Specification of Letters Patent. Application tiled July 24,1905.

Patented July 30, 1907` Serial No. 270,921.

To all 'whom it may concern:

lBe it known that I, OLOF OuLsON, county of Middlesex and State ofMassachusetts, have invented certain new and useful Improvements inWatch-Regulators, of which the following is a specification.

The present invention relates to micrometer regulators for watches andhas for its object to provide a novel and improved regulator of thischaracter which is simpler in construction and more easily andeconomically made and assembled.

The details of the invention are set forth in the followingspecification and illustrated in the drawings, in Which,-

Figure l represents a plan of a balance cock having my regulatorsct upthereon. Fig. 2representsa longitudinal central section on line 2 2 ofFig. l. Figs. 3 and 4 represent views similar to Fig. l, and showing theparts of the regulator in different positions.

The same reference characters indicate the saine parts in all thefigures.

Referring to the drawings, a represents the balanceholding cock of awatch or clock movement which is constructed in the usual way. It has acircular undercut projection b at its end and over this is placed andheld rotatably thereon an annular ring c provided with a lateral arm (lcarrying the curb-pins e which embrace the hair-spring in the usualmanner and serve to vary the effective length thereof when moved to agreater or less distance from the end of such spring.

Pivoted upon the cock is a rotary disk or wheel f which has upon itsperiphery alternate depressions g and teeth h by which it may be engagedand turned. It is held to the cock by a stud t which is threaded intothe wheel from the under side of the cock and has a circular bearingportion j which is journaled in a hole in the cock.

of Newton, in the spring k located in a recess Z of the cock, whichspring bears against the head of screw t' and tends to hold the latteraway from the cock, drawing the wheel against the upper surface of thelatter. In the wheel f is a curved slot or recess m of which the sidethat is normally nearest the balance-staff bearing is formed in aparticular manner so as to constitute a cam. n is connected to the ringe and extends across over theI wheel, carrying at its end a pin into theslot m and is adapted to be engaged by the cam surfaces. In a perfectlyadjusted watch movement in which the hairspring is of the proper lengthbefore` the movement is assembled, the parts would occupy the positionshown in Fig. l, with the regulator arm n on the line joining thecenters of the disks and balance bearing. In this position the pin o isheld between the sides of a notch y) formed in the cam side of the slot.

From the notch p cam surfaces q and r extend to the right and leftrespectively, and extend substantially equal distances. These camsurfaces are formed as spiral curves, the radii of the several points onthe surfaces varying uniformly with the angles of these points from thecenter line of Fig. l. Therefore as the wheel is turned equal angles ineither direction the points of the surface which act against the pin oare at correspondingly and uniformly increasing distances away from thecenter, and the pin is therefore moved and the arm n with distancesvarying proportionally to the angles through which the wheel is turned.The two curves q and r are exactly alike but are reversely arranged andit will therefore be seen that they are similar and symmetricallyplaced' with respect to the center line of Fig. 2, which is a diameterof the wheel f passing through the middle portion of slot m..

Adjacent the wheel is a plate s which is rigidly attached to the cockand has an indexing edge t curved concentrically with the wheel locatedadjacent the periphery thereof and formed with index marks u. Theseindexmarks serve to determine in the usual manner the amount through whichthe wheel is rotated. The ends ofthe plate are reduced in width andcurve about the outside of the wheel, being carried almost completelyabout the same, and their ends brought into engagement with oppositesides of a regulater arm n, These end portions of the plate constitutespring arms 1) w which press oppositely against the regulator arm andserve to hold the pin carried thereby against one of the cam surfaces qr depending upon the direction in which the arm is displaced. If thewheel f is turned in left-hand rotation the regulator arm is moved tothe right and spring arm e is distorted, while spring w is left, whileif the wheel is turned in the opposite direction, the cam surface q actsupon the pin and moves the regulator to the left, displacing spring w,leaving spring o in its normal position. When the arm is central, bothofthe springs press upon it and are in Condition always to hold pin oagainst whichever cam surface may be acting upon it.

It will be seen that the regulator as above described combines thefeatures of micrometer regulation with simplicityV and ease ofconstruction. There are no parts which require excessive care in themanufacture or in assembling them. The ordinary regulator arm having thering and curb-pins may be used with the simple addition of applying thepin o to it, while the cam surfaces may be made very easily as greataccuracy or care in constructing them is not required. The pin is alwaysheld in Contact with the cam which acts on l it by one oi the springarms so that it can yield tor inaccuracies oi the surface so that thecams need not be as carefully made as would be the case if they Wereobliged to act positively to move the regulator' arm in both directions.There is also no necessity or cutting gear teeth on the wheel orregulator bar, and this operation, which is one of the most expensive inthe manufacture ot the micrometer regulators now commonly used, iseliminated.

I claim:-

l. A regulator comprising a regulator arm, a rotatable disk providedwith a plurality of similar spiral cam suraces symmetrically arranged onopposite sides ot'a diameter ot the disk and between the circumferenceand center thereof, a projection on said arm arranged to engage saidsurfaces and movable thereby past the center of the disk, and springsbearing against opposite sides of said arm and acting to hold saidprojection in contact at all times with one or the other of said camsurfaces.

2. A regulator comprising a toothed wheel having a vcurved slot, one ofthe sides of said slot being constructed to i'orm a pair of spiral camssymmetrically arranged on opposite sides of a diameter of the wheeltraversing the middle of the slot, a regulator arm having an extensionfor engaging the hair-spring and extending across the wheel, a pincarried by the arm projecting into the slot and adapted to engage thecams, and springs on opposite sides of the regulator arm arranged tobear against the same and retain the pin in engagement with one or theother of said cams.

3. A regulator comprising a toothed wheel having a curved slot, one ofthe sides of said slot being constructed to form a pair of spiral camssymmetrically arranged on opposite sides of a diameter of the wheeltraversing the middle of the slot, a regulator arm having an extensionfor engaging the hair-spring and extending across the wheel, a pincarried by the arm projecting into the slot and adapted to engage thecams, and spring arms surrounding the wheel and arranged to bear attheir ends against the opposite sides of the regulator arm to hold thepin carried thereby in contact with one or the other of said cams.

4. A regulator for Watches and clocks comprising a cireumferentiallytoothed Wheel pivoted to the balance cock ol the Watch or clockmovement, a curved slot formed in the wheel with one of its sides shapedto make two spiral cams located symmetrically on opposite sides of adiameter of the wheel crossing the center of the slot, a regulator armextending across the wheel, a pin mounted on the arm projecting into theslot, springs acting against the sides of said regulator arm to hold thepin in engagement with one or the other of said cams, and a platemounted on the cock having a curved side bearing index graduations adjacent the rim of the wheel.

5. A regulator for watches and clocks comprising a circumerentiallytoothed wheel pivoted to the balance cock of the watch or clockmovement, a curved slot formed in the wheel with one of its sides shapedto make two spiral cams located symmetrically on opposite sides of adiameter of the wheel crossing the center of the slot, a regulator armextending across the wheel, a pin mounted on the arm projecting into theslot, a plate mounted on the cock having a curved side bearing indexgraduations adjacent the circumference of the wheel, and curved springarms torming continuations ot said plate carried around the wheel and`arranged to act against the sides of said regulator arm to hold the pinat all times in contact with one or the other of said cams.

In testimony whereof l have ailxed my signature, in presence of twowitnesses.

OLOF OHLSON.

Witnesses z A. C. RnTroaN, ARTHUR II. BROWN.

